Chromatographic analysis technology is a kind of separation and analysis technology of multi-component mixture. It mainly makes use of the difference of boiling point polarity and absorption add coefficient of each component in the sample in the chromatographic column, so that each component can be separated in the chromatographic column, and detect the separated components by detection apparatus, so as to conduct qualitative and quantitative analysis of multi-component mixture. Because this method has a high separation efficiency, fast analysis, less sample consumption etc, therefore has been widely used in petrochemical, biochemical medicine and health food of the health and quarantine inspection of environmental protection industry in the medical clinical departments by gas chromatography in the field of solve the industrial production of intermediates and pollution detection of industrial products quality inspection scientific research production control and other issues. Chromatographic instrumentIt is a kind of high cost performance, multi-function, economical and practical precision instrument, which adopts three-column and three-gas circuit operating system. The basic type is equipped with hydrogen flame ionization detection (FID) and thermal conductivity detection device(TCD). Chromatographic instrumentUsing microcomputer and integrated circuit control, English and Chinese interface, high degree of self-motion and good reliability, operating parameters keyboard setting instrument with power failure protection file storage and call function instrumentLarge screen liquid crystal display,The detection apparatus and its control assembly unit adopt plug and play control mode,simplicity of operator for the instrument to conduct constant temperature and program temperature rise operation column room is equipped with flexible rear door self-motiontemperature control system, the column box has excellent performance, high precision temperature control, quick rise and drop speed and flexible air temperature operation process Reliable, easy to expand, suitable for a variety of detection and sample combinations. The detector adopts the unitized combination design, which is easy to install and maintain. The chromatograph can be configured with a variety of detectors (TCD, FID, ECD, FPD and NPD). According to the user's analysis needs, the chromatograph can be configured with up to four detectors at the same time. The chromatograph's injection system can be equipped with a variety of injection devices, such as filling column head injection, glass lining rapid injection, and capillary column divided/undivided injection with diaphragm cleaning function.